Cibodas Botanical Garden Rubus Agriculture Anaphalis longifolia Biwa Cibodas Botanic Garden Ecology Ekologi Flowering period Forestry Fruit nutrient Gamma-ray In vitro Indonesia Inventarisasi Inventory Loquat Mutant North Sumatera Plant Production Prunus Rubus fraxinifolius Sumatera Utara Toba Lake chemical and physical mutagens edelweiss fruit collections generative germination loquat mutation breeding naturalize potential fruit crop seed grading seed storage wild raspberries